libgui|PersistentCanvasWindow: Saving and restore state during runtime

The window can now remember or restore its state at any point without touching the Config.
skyjake · Nov 30, 2014 · 695e167 · 695e167
1 parent 8cfdc6a
commit 695e167
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Showing 2 changed files with 28 additions and 6 deletions.
diff --git a/doomsday/libgui/include/de/gui/persistentcanvaswindow.h b/doomsday/libgui/include/de/gui/persistentcanvaswindow.h
@@ -144,6 +144,17 @@ class LIBGUI_PUBLIC PersistentCanvasWindow : public CanvasWindow
      */
     void restoreFromConfig();
 
+    /**
+     * Saves the current state in memory (not persistently). The saved state can
+     * later be restored with a call to restoreState().
+     */
+    void saveState();
+
+    /**
+     * Restores the attribuets of the window from previously saved state.
+     */
+    void restoreState();
+
     static PersistentCanvasWindow &main();
 
     // Events.

diff --git a/doomsday/libgui/src/persistentcanvaswindow.cpp b/doomsday/libgui/src/persistentcanvaswindow.cpp
@@ -432,8 +432,7 @@ DENG2_PIMPL(PersistentCanvasWindow)
 
     struct Task
     {
-        enum Type
-        {
+        enum Type {
             ShowNormal,
             ShowFullscreen,
             ShowMaximized,
@@ -457,16 +456,18 @@ DENG2_PIMPL(PersistentCanvasWindow)
 
     // Logical state.
     State state;
+    State savedState; // used by saveState(), restoreState()
     bool neverShown;
 
     typedef QList<Task> Tasks;
     Tasks queue;
 
     Instance(Public *i, String const &windowId)
-        : Base(i),
-          id(windowId),
-          state(windowId),
-          neverShown(true)
+        : Base(i)
+        , id(windowId)
+        , state(windowId)
+        , savedState(windowId)
+        , neverShown(true)
     {
         // Keep a global pointer to the main window.
         if(id == MAIN_WINDOW_ID)
@@ -818,6 +819,16 @@ void PersistentCanvasWindow::restoreFromConfig()
     d->applyToWidget(d->state);
 }
 
+void PersistentCanvasWindow::saveState()
+{
+    d->savedState = d->widgetState();
+}
+
+void PersistentCanvasWindow::restoreState()
+{
+    d->applyToWidget(d->savedState);
+}
+
 bool PersistentCanvasWindow::isCentered() const
 {
     return d->state.isCentered();